Altaic etymology :

Comments:Mong. has also *čaji- / *čeji- 'be white, whitish', associated in the modern language rather with *čaga-ɣan 'white' (see *šā̀k`a), but phonetically rather going back to *čaŋi- < *šaŋu. Despite Rozycki 193, the TM forms are hardly borrowed < Mong.